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75258-12-7

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75258-12-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 75258-12-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,2,5 and 8 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 75258-12:
(7*7)+(6*5)+(5*2)+(4*5)+(3*8)+(2*1)+(1*2)=137
137 % 10 = 7
So 75258-12-7 is a valid CAS Registry Number.

75258-12-7Relevant articles and documents

SYNTHESIS OF ETHYNYLINDOLES

Shvartsberg, M. S.,Vasilevskii, S. F.,Prikhod'ko, T. A.

, p. 2226 - 2229 (1982)

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PREPARATION AND NONLINEAR OPTICAL PROPERTY OF POLYDIACETYLENES FROM UNSYMMETRICAL DIPHENYLBUTADIYNES WITH TRIFLUOROMETHYL SUBSTITUENTS

Okada, Shuji,Ohsugi, Minoru,Masaki, Atsushi,Matsuda, Hiro,Takaragi, Shigeru,Nakanishi, Hachiro

, p. 81 - 90 (2007/10/02)

In order to obtain the polydiacetylenes having ?-conjugation between polymer backbone and side chains, many of unsymmetrical diphenylbutadiyne derivatives with trifluoromethyl substituents on one of the phenyl rings have been synthesized.Among them, 1-(3-(methylamino)phenyl)-4-(3,5-bis(trifluoromethyl)phenyl)butadiyne (MADF) was found to be topochemically polymerized with complete conversion into the polymer single crystals.Spectroscopies and X-ray crystal structure analysis revealed that the ?-conjugation of this polymer are more extended than those of the sofar prepared poly(diphenylbutadiyne)s, with smaller dihedral angles between ?-conjugation planes of polymer backbone and phenyl rings.The extended ?-conjugation was also confirmed by larger χ(3) values.

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